{# Persistent Chat Widget - Always Available #}
{% if is_module_enabled('team_chat') %}
<div id="persistentChatWidget" class="relative z-[60] flex shrink-0 flex-col items-end">
    <!-- Minimized State - Chat Button -->
    <button 
        id="chatWidgetToggle"
        onclick="toggleChatWidget()"
        class="w-14 h-14 bg-primary text-white rounded-full shadow-lg hover:bg-primary-dark transition-all flex items-center justify-center relative"
        aria-label="{{ _('Toggle chat') }}"
    >
        <i class="fas fa-comments text-xl"></i>
        <span id="chatUnreadBadge" class="absolute -top-1 -right-1 bg-rose-500 text-white text-xs rounded-full w-5 h-5 flex items-center justify-center hidden">0</span>
    </button>

    <!-- Expanded State - Chat Panel -->
    <div id="chatWidgetPanel" class="hidden bg-card-light dark:bg-card-dark rounded-lg shadow-2xl border border-border-light dark:border-border-dark flex flex-col">
        <!-- Header -->
        <div class="p-4 border-b border-border-light dark:border-border-dark flex items-center justify-between bg-gradient-to-r from-primary/10 to-primary/5">
            <div class="flex items-center gap-2">
                <i class="fas fa-comments text-primary"></i>
                <h3 class="font-semibold text-text-light dark:text-text-dark">{{ _('Chat') }}</h3>
            </div>
            <div class="flex items-center gap-2">
                <button 
                    onclick="openChatUserSelector()" 
                    class="p-1.5 hover:bg-background-light dark:hover:bg-background-dark rounded transition-colors"
                    title="{{ _('Start new chat') }}"
                >
                    <i class="fas fa-plus text-text-muted-light dark:text-text-muted-dark"></i>
                </button>
                <button 
                    onclick="loadChatWidgetChannels(); if(chatWidgetState.currentChannelId) loadChatWidgetMessages(chatWidgetState.currentChannelId);" 
                    class="p-1.5 hover:bg-background-light dark:hover:bg-background-dark rounded transition-colors"
                    title="{{ _('Refresh') }}"
                >
                    <i class="fas fa-sync-alt text-text-muted-light dark:text-text-muted-dark"></i>
                </button>
                <button 
                    onclick="toggleChatWidget()" 
                    class="p-1.5 hover:bg-background-light dark:hover:bg-background-dark rounded transition-colors"
                    title="{{ _('Minimize chat') }}"
                >
                    <i class="fas fa-minus text-text-muted-light dark:text-text-muted-dark"></i>
                </button>
            </div>
        </div>

        <!-- Content Area -->
        <div class="flex-1 flex overflow-hidden">
            <!-- Channels/DMs List -->
            <div id="chatWidgetSidebar" class="w-1/3 border-r border-border-light dark:border-border-dark bg-background-light dark:bg-background-dark overflow-y-auto">
                <div class="p-2">
                    <div class="text-xs font-semibold text-text-muted-light dark:text-text-muted-dark uppercase px-2 py-1 mb-1">{{ _('Channels') }}</div>
                    <div id="chatWidgetChannels" class="space-y-1">
                        <!-- Channels will be loaded here -->
                    </div>
                    
                    <div class="text-xs font-semibold text-text-muted-light dark:text-text-muted-dark uppercase px-2 py-1 mt-4 mb-1">{{ _('Direct Messages') }}</div>
                    <div id="chatWidgetDirectMessages" class="space-y-1">
                        <!-- Direct messages will be loaded here -->
                    </div>
                </div>
            </div>

            <!-- Chat Messages Area -->
            <div id="chatWidgetMessages" class="flex-1 flex flex-col">
                <!-- No channel selected state -->
                <div id="chatWidgetEmpty" class="flex-1 flex items-center justify-center p-4 text-center text-text-muted-light dark:text-text-muted-dark">
                    <div>
                        <i class="fas fa-comments text-4xl mb-2 opacity-50"></i>
                        <p class="text-sm">{{ _('Select a channel to start chatting') }}</p>
                    </div>
                </div>

                <!-- Active channel view -->
                <div id="chatWidgetActiveChannel" class="hidden flex-1 flex flex-col">
                    <!-- Channel header -->
                    <div id="chatWidgetChannelHeader" class="p-3 border-b border-border-light dark:border-border-dark bg-card-light dark:bg-card-dark">
                        <div class="flex items-center justify-between">
                            <div>
                                <h4 id="chatWidgetChannelName" class="font-semibold text-text-light dark:text-text-dark"></h4>
                                <p id="chatWidgetChannelStatus" class="text-xs text-text-muted-light dark:text-text-muted-dark"></p>
                            </div>
                            <a 
                                id="chatWidgetViewFull"
                                href="#"
                                target="_blank"
                                class="text-xs text-primary hover:underline"
                            >
                                {{ _('View full') }}
                            </a>
                        </div>
                    </div>

                    <!-- Messages container -->
                    <div id="chatWidgetMessagesContainer" class="flex-1 overflow-y-auto p-4 space-y-3">
                        <!-- Messages will be loaded here -->
                    </div>

                    <!-- Message input -->
                    <div class="p-3 border-t border-border-light dark:border-border-dark bg-card-light dark:bg-card-dark">
                        <form id="chatWidgetMessageForm" class="flex gap-2">
                            <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
                            <input 
                                type="text" 
                                id="chatWidgetMessageInput" 
                                placeholder="{{ _('Type a message...') }}" 
                                class="flex-1 form-input text-sm"
                                autocomplete="off"
                            >
                            <button 
                                type="submit"
                                class="bg-primary text-white px-4 py-2 rounded-lg hover:bg-primary-dark transition-colors text-sm"
                            >
                                <i class="fas fa-paper-plane"></i>
                            </button>
                        </form>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

<script>
// Chat widget state
let chatWidgetState = {
    isOpen: false,
    currentChannelId: null,
    channels: [],
    directMessages: []
};

// Initialize chat widget
function initChatWidget() {
    // Load state from localStorage
    const savedState = localStorage.getItem('chatWidgetState');
    if (savedState) {
        try {
            const parsed = JSON.parse(savedState);
            chatWidgetState.isOpen = parsed.isOpen || false;
            chatWidgetState.currentChannelId = parsed.currentChannelId || null;
        } catch (e) {
            console.error('Failed to load chat widget state:', e);
        }
    }

    // Widget is always visible, just set initial state
    const widget = document.getElementById('persistentChatWidget');
    if (widget) {
        if (chatWidgetState.isOpen) {
            openChatWidget();
        } else {
            // Ensure minimized state is shown
            const toggle = document.getElementById('chatWidgetToggle');
            const panel = document.getElementById('chatWidgetPanel');
            if (toggle) toggle.classList.remove('hidden');
            if (panel) panel.classList.add('hidden');
        }
    }

    // Load channels and messages
    loadChatWidgetChannels();
    
    // Set up message form handler
    const messageForm = document.getElementById('chatWidgetMessageForm');
    if (messageForm) {
        messageForm.addEventListener('submit', handleChatWidgetMessageSubmit);
    }

    // Load current channel if one was open
    if (chatWidgetState.currentChannelId) {
        loadChatWidgetChannel(chatWidgetState.currentChannelId);
    }
}

// Toggle chat widget open/closed
function toggleChatWidget() {
    if (chatWidgetState.isOpen) {
        closeChatWidget();
    } else {
        openChatWidget();
    }
}

// Open chat widget
function openChatWidget() {
    const toggle = document.getElementById('chatWidgetToggle');
    const panel = document.getElementById('chatWidgetPanel');
    
    if (toggle && panel) {
        toggle.classList.add('hidden');
        panel.classList.remove('hidden');
        chatWidgetState.isOpen = true;
        saveChatWidgetState();
    }
}

// Close chat widget (minimize)
function closeChatWidget() {
    const toggle = document.getElementById('chatWidgetToggle');
    const panel = document.getElementById('chatWidgetPanel');
    
    if (toggle && panel) {
        toggle.classList.remove('hidden');
        panel.classList.add('hidden');
        chatWidgetState.isOpen = false;
        saveChatWidgetState();
    }
}

// Save widget state to localStorage
function saveChatWidgetState() {
    try {
        localStorage.setItem('chatWidgetState', JSON.stringify({
            isOpen: chatWidgetState.isOpen,
            currentChannelId: chatWidgetState.currentChannelId
        }));
    } catch (e) {
        console.error('Failed to save chat widget state:', e);
    }
}

// Load channels and direct messages
function loadChatWidgetChannels() {
    fetch('/api/chat/channels', {
        method: 'GET',
        headers: {
            'X-Requested-With': 'XMLHttpRequest'
        }
    })
    .then(response => response.json())
    .then(data => {
        if (data.channels) {
            chatWidgetState.channels = data.channels.filter(c => c.channel_type !== 'direct');
            chatWidgetState.directMessages = data.channels.filter(c => c.channel_type === 'direct');
            renderChatWidgetChannels();
        }
    })
    .catch(error => {
        console.error('Error loading channels:', error);
    });
}

// Render channels and direct messages
function renderChatWidgetChannels() {
    const channelsEl = document.getElementById('chatWidgetChannels');
    const dmsEl = document.getElementById('chatWidgetDirectMessages');
    
    if (!channelsEl || !dmsEl) return;

    // Render channels
    if (chatWidgetState.channels.length === 0) {
        channelsEl.innerHTML = '<p class="text-xs text-text-muted-light dark:text-text-muted-dark px-2 py-1">No channels</p>';
    } else {
        channelsEl.innerHTML = chatWidgetState.channels.map(channel => `
            <button
                onclick="loadChatWidgetChannel(${channel.id})"
                class="w-full text-left px-2 py-1.5 rounded hover:bg-background-light dark:hover:bg-background-dark transition-colors text-sm ${chatWidgetState.currentChannelId === channel.id ? 'bg-primary/10 text-primary font-semibold' : 'text-text-light dark:text-text-dark'}"
            >
                <i class="fas fa-hashtag text-xs mr-1"></i>
                ${channel.name}
            </button>
        `).join('');
    }

    // Render direct messages
    if (chatWidgetState.directMessages.length === 0) {
        dmsEl.innerHTML = '<p class="text-xs text-text-muted-light dark:text-text-muted-dark px-2 py-1">No messages</p>';
    } else {
        dmsEl.innerHTML = chatWidgetState.directMessages.map(channel => `
            <button
                onclick="loadChatWidgetChannel(${channel.id})"
                class="w-full text-left px-2 py-1.5 rounded hover:bg-background-light dark:hover:bg-background-dark transition-colors text-sm ${chatWidgetState.currentChannelId === channel.id ? 'bg-primary/10 text-primary font-semibold' : 'text-text-light dark:text-text-dark'}"
            >
                <i class="fas fa-user-circle text-xs mr-1"></i>
                ${channel.name}
            </button>
        `).join('');
    }
}

// Load a specific channel
function loadChatWidgetChannel(channelId) {
    chatWidgetState.currentChannelId = channelId;
    saveChatWidgetState();

    // Hide empty state, show active channel
    const emptyEl = document.getElementById('chatWidgetEmpty');
    const activeEl = document.getElementById('chatWidgetActiveChannel');
    if (emptyEl) emptyEl.classList.add('hidden');
    if (activeEl) activeEl.classList.remove('hidden');

    // Update channel header
    const channel = [...chatWidgetState.channels, ...chatWidgetState.directMessages].find(c => c.id === channelId);
    if (channel) {
        const nameEl = document.getElementById('chatWidgetChannelName');
        const viewFullEl = document.getElementById('chatWidgetViewFull');
        if (nameEl) nameEl.textContent = channel.name;
        if (viewFullEl) viewFullEl.href = `/chat/channels/${channelId}`;
    }

    // Load messages
    loadChatWidgetMessages(channelId);
    
    // Update active state in sidebar
    renderChatWidgetChannels();
}

// Load messages for a channel
function loadChatWidgetMessages(channelId) {
    const container = document.getElementById('chatWidgetMessagesContainer');
    if (!container) return;

    container.innerHTML = '<div class="text-center py-4"><i class="fas fa-spinner fa-spin text-text-muted-light dark:text-text-muted-dark"></i></div>';

    fetch(`/api/chat/channels/${channelId}/messages?limit=50`, {
        method: 'GET',
        headers: {
            'X-Requested-With': 'XMLHttpRequest'
        }
    })
    .then(response => response.json())
    .then(data => {
        if (data.messages) {
            renderChatWidgetMessages(data.messages);
        }
    })
    .catch(error => {
        console.error('Error loading messages:', error);
        container.innerHTML = '<div class="text-center py-4 text-rose-600 dark:text-rose-400 text-sm">{{ _("Failed to load messages") }}</div>';
    });
}

// Render messages
function renderChatWidgetMessages(messages) {
    const container = document.getElementById('chatWidgetMessagesContainer');
    if (!container) return;

    if (messages.length === 0) {
        container.innerHTML = '<div class="text-center py-4 text-text-muted-light dark:text-text-muted-dark text-sm">{{ _("No messages yet") }}</div>';
        return;
    }

    container.innerHTML = messages.map(msg => {
        const time = new Date(msg.created_at).toLocaleTimeString([], { hour: '2-digit', minute: '2-digit' });
        return `
            <div class="flex items-start gap-2">
                <div class="w-8 h-8 rounded-full bg-primary/20 flex items-center justify-center flex-shrink-0">
                    <span class="text-primary text-xs font-semibold">${(msg.display_name || msg.username || 'U')[0].toUpperCase()}</span>
                </div>
                <div class="flex-1 min-w-0">
                    <div class="flex items-center gap-2 mb-1">
                        <span class="font-semibold text-sm text-text-light dark:text-text-dark">${msg.display_name || msg.username || 'Unknown'}</span>
                        <span class="text-xs text-text-muted-light dark:text-text-muted-dark">${time}</span>
                    </div>
                    <div class="text-sm text-text-light dark:text-text-dark whitespace-pre-wrap">${escapeHtml(msg.message || '')}</div>
                </div>
            </div>
        `;
    }).join('');

    // Scroll to bottom
    container.scrollTop = container.scrollHeight;
}

// Handle message submission
function handleChatWidgetMessageSubmit(e) {
    e.preventDefault();
    
    if (!chatWidgetState.currentChannelId) return;

    const input = document.getElementById('chatWidgetMessageInput');
    if (!input || !input.value.trim()) return;

    const message = input.value.trim();
    input.value = '';

    // Get CSRF token from meta tag or form
    const csrfToken = document.querySelector('meta[name="csrf-token"]')?.getAttribute('content') || 
                     document.querySelector('input[name="csrf_token"]')?.value || '';

    // Use FormData to send message (this endpoint handles CSRF properly)
    const formData = new FormData();
    formData.append('content', message);
    formData.append('csrf_token', csrfToken);

    fetch(`/chat/channels/${chatWidgetState.currentChannelId}/send-message`, {
        method: 'POST',
        headers: {
            'X-Requested-With': 'XMLHttpRequest'
        },
        body: formData
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            // Reload messages
            loadChatWidgetMessages(chatWidgetState.currentChannelId);
            // Reload channels to update last message
            loadChatWidgetChannels();
        } else {
            alert(data.error || '{{ _("Failed to send message") }}');
            input.value = message; // Restore message
        }
    })
    .catch(error => {
        console.error('Error sending message:', error);
        alert('{{ _("Failed to send message") }}');
        input.value = message; // Restore message
    });
}

// Escape HTML helper
function escapeHtml(text) {
    const div = document.createElement('div');
    div.textContent = text;
    return div.innerHTML;
}

// Initialize when DOM is ready
if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', initChatWidget);
} else {
    initChatWidget();
}

// Reload channels periodically
setInterval(loadChatWidgetChannels, 30000); // Every 30 seconds

// Reload channels when page becomes visible (user switches back to tab)
document.addEventListener('visibilitychange', function() {
    if (!document.hidden && chatWidgetState.isOpen) {
        loadChatWidgetChannels();
        if (chatWidgetState.currentChannelId) {
            loadChatWidgetMessages(chatWidgetState.currentChannelId);
        }
    }
});

// Make functions globally available for integration
window.openChatWidget = openChatWidget;
window.closeChatWidget = closeChatWidget;
window.loadChatWidgetChannel = loadChatWidgetChannel;
window.loadChatWidgetChannels = loadChatWidgetChannels;
window.toggleChatWidget = toggleChatWidget;
</script>
{% endif %}